Substitutes in Rigid Polyurethane, Appliance

Substitutes are reviewed on the basis of ozone
depletion potential, global warming potential,
toxicity, flammability, and exposure potential. Lists
of acceptable and unacceptable substitutes are updated
several times each year. A
chronological list of SNAP
updates is also available.

Note: SNAP Notices and Final Rules published in the
Federal Register take precedence over all infor
mation on the web site.

Acceptable Substitutes

Substitute
(and blends including that substitute)

ODS Being Replaced

HCFC-123

CFC-11

HFC-134a

CFC-11,
HCFCs

HFC-152a

CFC-11,
HCFCs

HFC-245fa

CFC-11,
HCFCs

HCFC-141b/HCFC-123 Blends

CFC-11

Formic
Acid

CFC-11,
HCFCs

Saturated Light Hydrocarbons (C3-C6)

CFC-11,
HCFCs

Electroset Technology

CFC-11; HCFC-22, HCFC-142b, and blends thereof

Carbon
Dioxide

CFC-11,
HCFCs

Vacuum
Panels

CFC-11,
HCFCs

Water

HCFCs

Exxsol
Blowing Agents

HCFCs

Methyl Formate

CFC-11, HCFCs

Ecomate

CFCs,
HCFCs

Transcend™ Technologies as an additive to
SNAP-approved blowing agents in blends making up to
5% by weight of the total foam formulation

CFCs,
HCFCs

HFO-1234ze

CFCs, HCFCs

HFC-365mfc

HCFC-141b; HCFC-22,
HCFC-142b, and blends thereof

Formacel® TI

HCFC-22, HCFC-142b

Trans-1-chloro-3,3,3-trifluoroprop-1-ene

CFC-11, HCFC-141b

Formacel® Z-6

HCFC-22, HCFC-142b, and
blends thereof

Substitutes that are Acceptable with Use
Conditions

None at this time
for either CFC-11 or HCFCs.

Substitutes that are Acceptable with Narrowed
Use Restrictions

None at this time
for either CFC-11 or HCFCs.

Unacceptable Substitutes

Substitute

ODS Being Replaced

Further
Information

HCFC-124

All

Alternatives exist with lower or zero-ODP.

HCFC-22, HCFC142b or blends thereof

CFCs, HCFC-141b

Alternatives exist with lower or zero-ODP.

HCFC-141b

All

Alternatives exist with lower or zero-ODP.
Exemptions exist for (1) the use of HCFC-141b for
space vehicle, nuclear and defense foam
applications, (2) the use of HCFC-141b for
laboratory research and development applications
for foreign customers and (3) allowing the use of
fully formulated HCFC-141b foam systems in
inventory before January 1, 2005, until July 1, 2005.
See the September 30, 2004, final rule, 69 FR 58269,
for further information.